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I Y 2 8heets-Sheet 1. M. BO-WE. sounw 15001:.

(No Hodel.)

Patented, Nov. 28, 1882.

WOTNE/SSES: fi.%%

. 2 Sheets-Sheet 2. M. BOWE.

' SCREW DOCK.

(Ho Mmiel.)

Nov. 28, 1 882.

PIE. 8.

WIT-NE S S UNITED STATES .PATENT O FI E.

oses sown, ourotuoo, OHIO, ASSIGNOR or ONF-HALF ro ALEX. wnnnn', I onSAME PLACE. v

scREw-o'ocK.

SPECIFICATION forming art of Letters liatent No. 268.177, dated November28, 1882.

Application filed May 29, 1885.. (No model.)

To all whom it may concern .Be it known that I, Moses BOWE, of Toledo,Lucas county, Ohio, have invented certain newand useful Improvements inscrew Docks, of which the following is a specification.

My invention relates to the arrangementand manner of construction ofdocksaud the various parts thereof, designed tolift vessels out of waterby inn-ans of screws; and the objects [0 of my invention ure,first, bymeans of the mechanism herein described, to provide simple means ofturning any or all olthe screws of the dock, either together at auniform rate of speed or imlepeudently of each other, so that thedifferent timbers upon which the vessel rest-s may be separately raisedand adjusted so as to conform to thelinc of the keel, t'husnvoidingundue strain upon the vessel, and so thatv the stem or stern of u vesselm ay be raised at the en trance to the dock without raising the wholevessel out of water, and so that at the same time two or more smallervessels or boats may be held in such dock without its being necessary toraise or lower them all at once; second, to arrange all gearing andworking parts so that they may be above water and easily accessible;and, third, to provide the hoisting-screws of the dock with nuts,piuions, and plates of peculiar form herein described, designed toobviate the 39 necessity for bolts, pins, screws, or rivets inconnecting such parts together, and to facilitate quick removals andrepairs in case of breakage. 1 attain these objects by the mechanismillustrated in the accompanying draw- 3 5 ings, which are made part ofthis specification,

in which--' i Figure 1 is a plan of the dock. Fig. 2 is it cross-sectionof the same between two pairs of screws. Fig. 3- is a centrallongitudinal vertical section of a, portion of the some. Fig. 4is anenlarged plan of the mechanism immedir I nteiy connected with thehoisting-screws. Fig. 5 is a vertical section, iii-detail, of one of thehoisting-screws, its nut, the pinion which revolves the nut, and theplate upon which the c not rests;-and Fig. 6 isa plan of said nut anddate. 1 Similar letters refer to similar parts throughout the severalviews and throughout the devi'ce.

" Upon eitherside-of the dock are driven two rows of piles, upon thetops of which are fixed the frames supporting the shutting, pinions,screws, clutches, &c. Motion is communicated to the machinery of thedock from a. steam- 5 5 engine by connection A, which revolves a-shaft,upon which is fixed pinion a, which engages pinion 1), upon the shaft Bof which are piuions C, which communicate motion to the sb'ultsextending along each side'of the dock, upon which shafts are fixedpinions d and e. The length of these shafts and the number-of pinions 6will depend upon the length and weight of the vessels which the dock isdesigned to handle. Pinions e transmit motion to piuions 6 5 f. Pinion eis lined to its shaft D. Pinion-f slides longitudinally upon its shaft,but rotates with it, the shaft being provided with a fast feather whichengages awslot in the eye of the pinion. By meaus'of lever g pinion fisslipped to and fro on its shaft and thrown in and out of gear withpinion e at will, sothat any one or more of the screws S may readily beset in motion 'or stopped; but obviously this particular form of clutchis not essential, as other forms 7 5 will readily suggest themscl res.When in gear, piuions f rotate pinions It upon the other end of the sameshaft, and the pinion's J1: en gage and communicate motion to thehorizontal beveled pinious i1 Pinion i has in its cen- 8o ter h squareopening, as shown in Ifig. 4, which opening receives and tits the squaretop or head of not it. I do not, however, limit my invention in thisparticular to a, square opening or to a square-headed nut, as almost anyother form, except round, would spbserve my purpose, though not sowellm. Milt n is provided with a shoulder, upon which rests pinion Thenut it, below the part which enters pinion 12, is circular anddisk-like, and has projecting from its bottom, aroundfthe outer edge, arim or ring, which sets into a corresponding circular channel, groove,or sentin the top of I o,which is a square plate resting upon-a tiinherof the frame of the dock, The pinion '41 carries with itjn itsrevolutions thet'nut n. which, resting upon plate 0, and being kept inposition by the ring and groove described, turns upon the thread ofscrew 8 and lifts-or" The plate 0 is provided with projections 19 st;bottom, which lit into holes in the timbers lowers the same, asherein-alterdescribed. i=oq thus holding the plateo stationary. Inpractice the tops of nut 10 and plate 0 are dished somewhat, so as toserve as a cup for lubricating-oil. 8 is a hoisting-screwpassing-through and fitting nut n, and having suspended from its lowerend the trussed cross-piece 20, which extends from screw to screw acrossthe width ofthe machine, and upon which vessels rest when lifted in thedeck.

The operation of the device is obvious. The

cross-pieces w being lowered to a 'suificient ing its screws-out of gearby means of the clutches e f g until all the cross-pieces are 'caused totouch .in the same manner, so as to v conform to and fit the shape ofthe keel, when all of the screws are set in motion and the vessel israised without undue strain upon her at any point. In this operation asevere strain falls upon pieces i a o, and breakages of these parts arelikely to occur. In such case the form and arrangement of these partsare such r Witnesses broken that the removal and renewal ot" the part isthe work of but a moment.

' What I claim as my invention,and desire to i secure by Letters Patent,is-

. v 1. In a screw-dock, the combination and the*- arrangement ofpinionsa b c d e f h z, together 'with their shafts, the clutches cf 9,nuts a,

plates 0, screws 3, and cross-pieces w, substantially as shown anddescribed, for the purposes specified.

7 2. The combination of the horizontal pinion 13, provided with a squareor' polygonal opening designed to receive the head of nut n,-the nut' n,having a square 'orpoly'gonal head, and provided with an annular rib, r,on its under side, and plate 0, provided with annular groove designed toreceive rib 1*, plate 0 being also provided at bottom with projections11, substantially as shown and described, for the purposes set forth.

3. The combination of pinion "i, nut a, plate 0, and screw .9,substantially'as'shown and described, for the purposes set forth;

4. The combination of clutch efg with pinious h and i, nut' a, plate 0,and screw .9, substantially as shown and described, for the purposesspecified. I

- Mosnssown;

E a. Harms; NoArr N. SWAYNE, Jr.

